Blender base



FIG. 1 is a front perspective view of a blender base showing my new design therefor, parts shown in phantom lines being environment only and forming no part of the design;

FIG. 2 is a front elevational view thereof, parts shown in phantom lines being environment only and forming no part of the design;

FIG. 3 is rear elevational view thereof, parts shown in phantom lines being environment only and forming no part of the design;

FIG. 4 is a side elevational view thereof, parts shown in phantom lines being environment only and forming no part of the design;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof, parts shown in phantom lines being environment only and forming no part of the design. 

The ornamental design for a blender base, as shown and described. 